Are Dunlop grips more shaped like Head or Wilson rackets (or different). Also, do Dunlops permit adding lead inside the handle like some Prince rackets and Babolats. This is where you can take at the cap on the bottom of the handle and put lead balls into the handle and place the cap back on. Last question, can you do this(adding lead inside handle) with a head racket? I know you can't with Wilson.